Guild · Connecticut · BBS 2025 Release · 1966–2024
Wetland Birds In Connecticut
7 species in this guild. As a group they are +26% since 1969.
Guild Signals
No notable trend signals for wetland birds in Connecticut. See the full index history below.
Forecast
If the recent trend holds, Wetland birds in Connecticut is projected to stay roughly flat through 2029, near 0.34 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±17.2%, with 100% of held-out values landing inside the 95% band.
-7%Change by 2029
0.34Projected 2029 index
0.00–1.095% range
±17.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.39 | 0.00 | 1.0 |
| 2026 | 0.38 | 0.00 | 1.0 |
| 2027 | 0.36 | 0.00 | 1.0 |
| 2028 | 0.35 | 0.00 | 1.0 |
| 2029 | 0.34 | 0.00 | 1.0 |
Member Species In Connecticut
| Double-crested Cormorant | Phalacrocoracidae | -55% |
| Green Heron | Ardeidae | -46% |
| Ring-billed Gull | Laridae | -19% |
| Herring Gull | Laridae | -18% |
| Black-crowned Night Heron | Ardeidae | -5% |
| Great Black-backed Gull | Laridae | +7% |
| Great Blue Heron | Ardeidae | +768% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.